When using some java applications, like Oracle SQL developer, I get a GPU hang.. for some seconds the screen becomes black and unresponsive then it comes back to life.
This issue was not present in Oneiric so it seems a regression.
The laptop is a Dell L702X with an integrated Intel GPU..
this is the lcpci:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Dell Device 0571
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 52
Region 0: Memory at f2400000 (64-bit, non-prefetchable) [size=4M]
Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
Region 4: I/O ports at 5000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915
and this is the error found in dmesg after the hangup:
[ 4889.687609] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung
[ 4889.687669] [drm] capturing error event; look for more information in /debug/dri/0/i915_error_state
[ 4889.699461] [drm:i915_wait_request] *ERROR* i915_wait_request returns -11 (awaiting 332264 at 332261, next 332265)
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
Uname: Linux 3.2.0-21-generic x86_64
ApportVersion: 2.0-0ubuntu2
Architecture: amd64
Date: Sun Apr 1 07:47:05 2012
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: No upgrade log present (probably fresh install)
For GPU lockup bugs with Intel graphics, you need to collect the output of 'dmesg' and your /sys/kernel/